Do some research. You can get a Digital Torch Height (aka ATHC) for less than 1/3 of that price including the control software.
You need to provide some form of height control unless you have a spring loaded head and a drag tip. You have to cut at .063 above the material moving at 100 to 300 IPM. Thin material buckles enough to cause tip crashes. If the material is not perfectly level you have added problems.
For 2400 bucks you can get a complete electronics bundle including motors, drives and power control with a digital THC.